PC spins up and starts for half a second before turning off, Help Please

LightningsalesUK

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Dec 25, 2013
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Hi,
I recently got a new motherboard and extra ram for my pc, it all worked well before, when i switched to a new motherboard it starts for half a second before it turns off, sometimes it will restart again by itself for half a second however most times it takes a button to turn it on. i changed it back the cpu to the old motherboard and the problem still persists. i did some research and decided to buy a new psu, i tested the psu with the old mobo and it seemed to power up, i had it running for 5 minutes sadly i didnt have a monitor to test the output, i presumed it worked so i put the cpu in the new mobo and it had the same problem where it booted for half a second. after a few attempts at booting and looking at the bios battery i switch it back to the old motherboard and it starts again however has no video output, im not sure what the problem is but any help is much appreciated.
Thanks

A Video Of what is happening https://www.youtube.com/watch?v=PV7Yw5HvbZA
Specs;
i7 4770k
Old mobo: asus z97-k
new mobo: gigabyte z97x-gameplus
psu: evga 850w nova gold
ram old 4x2gb 1600mhz corsair lp
new extra ram 4x2gb 1600mhz corsair lp
gpu: gtx 980